Re-named in 1832 by François Sulpice Beudant after its type locality in the Spessart Mountains, Germany. Previously distinguished as a "manganesian" garnet by Henry Seybert in 1823 using mineral from Haddam, Connecticut, USA. Originally, this mineral, from Spessart Mountains, was called "granatförmiges Braunsteinerz" in 1797 by Martin Klaproth.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality.
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- This locality has map coordinates listed. - This locality has estimated coordinates.ⓘ - Click for further information on this occurrence.? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant.(TL) - Type Locality for a valid mineral species.(FRL) - First Recorded Locality for everything else (eg varieties).Struck out - Mineral was erroneously reported from this locality.Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.

Hutton, C. O. (1957): Contributions to the mineralogy of New Zealand. Part IV. Transactions of the Royal Society of New Zealand 84, 791-803. [http://rsnz.natlib.govt.nz/volume/rsnz_84/rsnz_84_04_007850.pdf]

Russell, A. (1946). On rhodonite and tephroite from Treburland manganese mine, Altarnun, Cornwall; and on rhodonite from other localities in Cornwall and Devonshire. Mineralogical Magazine, 27(194), 221-235.

Sheppard, J. B. (2008), History of the surface prospects and underground mining developments made along the northern portion of the Stewart pegmatite; personal communication with Scott L. Ritchie, San Diego Mining Company (SDMC). June/July.

Sheppard, J. B. (2008), History of the surface prospects and underground mining developments made along the northern portion of the Stewart pegmatite; personal communication with Scott L. Ritchie, San Diego Mining Company (SDMC). June/July.

Seaman, David (1976): "Pegmatite Minerals of the World" in: Januzzi, Ronald E. and David Seaman.(1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. (The Mineralogical Press: Danbury, Connecticut).; Harold Moritz collection.

Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.

James G. Manchester & Gilman S. Stanton (1917) A Discovery of Gem Garnets in New York City, American Mineralogist 11:5 85-86
James G. Manchester (1931) The Minerals of New York City and Its Environs, NY Mineralogical Club, v. 3 No. 1. 23-24.

Tappen,Christine,Smith,Michael and Dockal,James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District,Mitchell County,North Carolina Proceedings of the 42nd Forum on the Geology of Industrial Minerals at Asheville, North Carolina,Information Circular 34, NCGS

Flohr, M.J.K., Dillenburg, R.G., and Plumlee, G.S. (1995): Characterization of secondary minerals formed as the result of weathering of the Anakeesta Formation, Alum Cave, Great Smoky Mountains National Park, Tennessee: USGS Open File Report #95-477, 24 p.